Stuffing-box construction for pumps



May 22, 1928.

' 1,670,368 E. MacPHERSON STUFFING BOX CONSTRUCTION FOR PUMPS Filed July 28, 1924 Y.

\\\ 2l v 8 A ,Z/f/ 6 p o 1 9 7% 20' 6 n 7 O JW?? awww@ @Hoznutd Patented May 22, 1.928.

UNITED sTATEs mLE S. IAOPHERSON, OI' DETROIT, MICHIGAN, ASSIGNOR TO HUP? MOTOR CAB PATENT OFFICE.

CORPORATION, Ol' DETROIT, MICHIGAN, A. CORPORATION OF VIRGINIA.

s'rUrrme-nox ooNsrnUc'rIoN ron. yours.

Application lled July 88,

This invention relates generally to pumps and refers more particularly to water pumps designed to effect the circulation of the cooling)water of an internal combustion engine.

ne of the essential objects of the invention is to provide simple and effective means for positively lubricating the packin rings surrounding the rotating shafts o such pumps.

With the above and other objects in view,

the invention consists in certain novel features of construction, combinations and arrangements of parts as will be more fully described and articularly pointed out in the appended c aim.

In the accompanying drawing:

Figure 1 shows a vertical sectional view through a pump assembly embodying my 1nvention.

Figure 2 is a sectional view taken on the 4 line 2-2 of Figure 1.

Heretofore only one packingt ring has been used on the rotating sha of water pumps of the type described, and the lubricant has been forced by suitable means to either the left or ri ht of the ring for lubricating the same. owever it has been found that such constructions are objectionable because the lubricant can esca without touching the packing rings and t erefore does not vinsure the positive lubrication thereof. With the present invention the objections just referred to are entirely overcome and I have preferably provided spaced packing rings and direct the lubricant between the same so that it must pass the packing rings to escape.

Referring now to the drawings in which like characters of reference designate corresponding parts throughout the several v views, the numeral 1 designates a rotor mounted upon a shaft 2 which extends through the rear end wall 3 of the pump casing and is preferably journaled in a stuifing box 4 located adjacent to the hub 5 of the rotor. This stuiiing box 4 is'preferably cup shaped and fits in an aperture 6 formed by a horizontal ange 7 upon the partition wall 8 of the pump casing. A cap bolt 9 1s 5 preferably used to secure the stuihng box 4 1924. sel-u1 lo. maas.

in place, whilea nut 10 preferably threadedly engages' the open end of the stuiling box and is adapted to move a suitable gland 11 in -the stufling box for compressing the metalhc packing rings 12 surrounding the shaft 2. This nut is insertable axially inward of the shaft 2 within the horizontal portion 13 ofthe pump casing and has at its outer end a horizontal flange 14 which fits within an aperture 15 formed in the rear end wall 3 of the pump casing. As shown, the nut forms a bearing for the rear end of the shaft and preferably receives a bushing 16 in which the -rear end of the shaft is journaled. i

In order that both packing rings 12 may be positively lubricated, I preferably provide a bronze spacer ring 17 that surrounds the shaft 2 between the ackng rings 12 and is provided with spaced radially extending passa es 18 which communicate with a periphera roove or channel `19. Communicating wi this channel 19 are a series of spaced radiall extendin passages 20 which extend throug the stu g box 4 and connect into a ri heral groove 21. This .groove 21 pre era ly Acommunicates in turn `,with a suitable passage 22 that extends transversely of the pump casing and receives the lubrlcant from a sultable source of supply (not shown). Thus, with lthis construction the lubricant supplied to the spacer 17 y will have to pass the packing rings 12 before it can escape, hence positive and complete Slubrication is ensured for the .packing rlngs.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily apparent, I desire to have it understood that do not limit myself to what is herein shown and described, and that such changes may be resorted to when desired/as fall within the scope' of what is claimed.

What I claim as vmy invention is:

In a pump, the combination with a pump casing having spaced vertical. walls provided with aligned openings-therethrough and horizontal annular flanges surrounding said openings, a cylindrical cup shaped stuiing box extending through one of said casing and adapted to compress the land openings and supported in the horizontal against the packing rings, said nutA eing 10 flange thereof, a rotatable shaft extending provided with a bore constituting a bearing through an opening in said stuiiing box, for the shaft, and means for lubricating packing rings 1n said stuffing box surroundsaid shaft.

ing said shaft, a gland for retaining said In testimony whereof I aix my signature. packin rings therein, a nut insertable throng the opening in the other wall of the EARLE S. MAOPHERSON. 

